OTHER CONTINGENCIES AND COMMITMENTS (Natural Gas Compressor Station Sites) (Details) $ in Millions	Mar. 31, 2020 USD ($)
Topock Site
Long-term Purchase Commitment [Line Items]
Total wildfire-related claims	$ 216
Topock Site | Pacific Gas & Electric Co
Long-term Purchase Commitment [Line Items]
Remediation cost recovery percentage	90.00%
Hinkley Natural Gas Compressor Station
Long-term Purchase Commitment [Line Items]
Total wildfire-related claims	$ 129
Former Manufactured Gas Plant
Long-term Purchase Commitment [Line Items]
Total wildfire-related claims	$ 539
Remediation cost recovery percentage	90.00%
Utility Owned Generation Facilities and Third Party Disposal Sites
Long-term Purchase Commitment [Line Items]
Total wildfire-related claims	$ 78
Utility Owned Generation Facilities and Third Party Disposal Sites | Pacific Gas & Electric Co
Long-term Purchase Commitment [Line Items]
Remediation cost recovery percentage	90.00%
Fossil Fuel Fired Generation
Long-term Purchase Commitment [Line Items]
Total wildfire-related claims	$ 80